What Does Over 2.5 Goals Mean? A Guide To This Popular Football Betting Market What Is Over 2.5 Goals? Betting on over or under 2.5 goals is won of the most popular markets to football betting. It allows you to predict the total of goals in a game without having to pick a winner of the game. • For an under 2.5 goal back to win the match must finish with two or less goals. • For an over 2.5 goal bet to win the match must finish with three or more goals.